1 files changed, 5 insertions, 1 deletions
diff --git a/src/types.ts b/src/types.ts
index 46156b155..9d3127325 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -16,6 +16,8 @@ export const ZeroExError = strEnum([
     'INVALID_SIGNATURE',
     'CONTRACT_NOT_DEPLOYED_ON_NETWORK',
     'ZRX_NOT_IN_TOKEN_REGISTRY',
+    'INSUFFICIENT_ALLOWANCE_FOR_TRANSFER',
+    'INSUFFICIENT_BALANCE_FOR_TRANSFER',
 ]);
 export type ZeroExError = keyof typeof ZeroExError;
 
@@ -66,7 +68,9 @@ export interface TokenContract {
     allowance: {
         call: (ownerAddress: string, allowedAddress: string) => Promise<BigNumber.BigNumber>;
     };
-    transfer: (to: string, amountInBaseUnits: BigNumber.BigNumber, txOpts: TxOpts) => Promise<boolean>;
+    transfer: (toAddress: string, amountInBaseUnits: BigNumber.BigNumber, txOpts: TxOpts) => Promise<boolean>;
+    transferFrom: (fromAddress: string, toAddress: string, amountInBaseUnits: BigNumber.BigNumber,
+                   txOpts: TxOpts) => Promise<boolean>;
     approve: (proxyAddress: string, amountInBaseUnits: BigNumber.BigNumber, txOpts: TxOpts) => void;
 }